Crimped Covered-Yarn Glove Coating for Adhesion and Fit
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Solution Overview
Problem
Conventional protective gloves made from heat-resistant high functional filament yarns suffer from poor adhesiveness between the rubber or resin coating material and the glove material, leading to peeling issues and reduced durability, while increasing coating material to enhance adhesiveness can result in poor fit and reduced workability.
Innovation Solution
A glove knitted from a covered yarn with a crimped sheath yarn that has bulkiness, stretchiness, and high tensile strength, coated with a polyurethane resin, where the sheath yarn is crimped by twisting and heat-setting, and the core yarn is elastic, ensuring strong adhesion and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the amount of coating material is increased to enhance adhesiveness, then adhesiveness and durability are improved, but the glove fit and workability deteriorate
Solution Approach 1:
The invention changes the physical parameters of the fiber surface by subjecting it to plasma treatment, which modifies the surface energy and chemical composition without changing the bulk properties. This allows the coating material to adhere better with reduced coating thickness, thus maintaining workability and fit while improving adhesiveness
Solution Approach 2:
The plasma-treated fiber surface acts as an intermediary layer between the fiber and the coating material. The treatment creates functional groups and increases surface roughness that serve as anchoring points for the coating material, improving adhesion without requiring excessive coating material that would compromise glove fit
2Temperature
If conventional non-stretch yarns are used for heat resistance, then heat resistance and flame retardancy are improved, but stretchiness and comfort deteriorate
Solution Approach 1:
The invention uses a composite structure consisting of heat-resistant high functional filament yarns combined with elastic fibers. The filament yarns provide heat resistance and flame retardancy, while the elastic fibers provide stretchiness and comfort. The plasma treatment on the fiber surface enhances the bonding between these different material components, creating a synergistic effect that maintains both heat resistance and stretchiness
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides excellent adhesiveness of the coating material to the glove, maintaining durability and fit, while preventing peeling and ensuring good workability with enhanced cut wound resistance.
Implementation Method 1
the sheath yarn is crimped by twisting and heat-setting
Implementation Method 2
excellent adhesiveness of the coating material to the glove
Data Source
AI summary
Provided is a glove which has good adhesiveness to a rubber or resin coating material and excellent durability and further fits a hand well enabling good work efficiency. The glove is knitted from a covered yarn obtained by winding a sheath yarn around a core yarn and at least a part of the surface thereof is coated with a rubber or resin coating material, wherein the sheath yarn is a crimped yarn made of a high strength fiber having, as a property of a raw yarn, a tensile strength of 1.75 N/tex or more as measured according to JIS L 1013 8.5, and the crimped yarn simultaneously satisfies the following (1) to (3): (1) a degree of bulkiness of 40 cm3/g or more as measured according to JIS L 1013 8.16 A method after hot water treatment at 90° C. for 20 minutes, (2) a bulk compression modulus of 80% or more as measured according to the same method, and (3) a shrinkage/elongation ratio of 20% or more as measured according to JIS L 1013 8.11 A method.